virtuoso_open_cellview · Virtuoso Schematic MCP

WHAT IT DOES

What virtuoso_open_cellview does on Virtuoso Schematic MCP

AI agents use virtuoso_open_cellview to create or update resources in Virtuoso Schematic MCP — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Virtuoso Schematic MCP environment.

WHY IT NEEDS A POLICY

Why virtuoso_open_cellview needs a policy

The tool can create a new cellview, which is a write operation creating new data. Opening an existing cellview is a read operation, but the 'or create' clause elevates it to Write. It does not execute code, delete data, or involve financial transactions. Severity is medium because creating or modifying schematic cellviews could affect design integrity.

From the tool's definition Open (or create) a cellview in Virtuoso.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

virtuoso_open_cellview Rate-limited

virtuoso_open_cellview stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "virtuoso_open_cellview": {
      "limits": [
        {
          "counter": "virtuoso_open_cellview_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Virtuoso Schematic MCP, so you can run agents against it safely.

FAQ

Questions about virtuoso_open_cellview

What does the virtuoso_open_cellview tool do? +

Open (or create) a cellview in Virtuoso. It is categorised as a Write tool in the Virtuoso Schematic MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on virtuoso_open_cellview? +

Register the Virtuoso Schematic MCP server in PolicyLayer and add a rule for virtuoso_open_cellview: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Virtuoso Schematic MCP. Nothing to install.

What risk level is virtuoso_open_cellview? +

virtuoso_open_cellview is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit virtuoso_open_cellview? +

Yes. Add a rate_limit block to the virtuoso_open_cellview rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block virtuoso_open_cellview completely? +

Set action: deny in the PolicyLayer policy for virtuoso_open_cellview. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides virtuoso_open_cellview? +

virtuoso_open_cellview is provided by the Virtuoso Schematic MCP server (michelebergo/virtuoso-schematic-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.